Lead(II) acetate

Lead(II) acetate

Names
IUPAC name Lead(II) ethanoate
Systematic IUPAC name Lead(II) ethanoate
Other names Plumbous acetate, Salt of Saturn, Sugar of Lead, Lead diacetate
Identifiers
CAS Number	301-04-2 Y 6080-56-4 (trihydrate) N 51404-69-4 (Basic) N
3D model (Jmol)	Interactive image
ECHA InfoCard	100.115.474
EC Number	206-104-4
MeSH	lead+acetate
PubChem CID	9317
RTECS number	OF8050000
InChI InChI=1S/2C2H4O2.Pb/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 N Key: GUWSLQUAAYEZAF-UHFFFAOYSA-L N InChI=1S/2C2H4O2.Pb/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 Key: GUWSLQUAAYEZAF-UHFFFAOYSA-L
SMILES CC(=O)[O-].CC(=O)[O-].[Pb+2]
Properties
Chemical formula	Pb(C2H3O2)2
Molar mass	325.29 g/mol (anhydrous) 379.33g/mol (trihydrate)
Appearance	White powder or colourless, efflorescent crystals
Odor	Slightly acetic
Density	3.25 g/cm3 (20 °C, anhydrous) 2.55 g/cm3 (trihydrate) 1.69 g/cm3 (decahydrate)
Melting point	280 °C (536 °F; 553 K) (anhydrous) 75 °C (167 °F; 348 K) (trihydrate) decomposes at ≥ 200 °C 22 °C (72 °F; 295 K) (decahydrate)
Boiling point	Decomposes
Solubility in water	Anhydrous: 19.8 g/100 mL (0 °C) 44.31 g/100 mL (20 °C) 69.5 g/100 mL (30 °C) 218.3 g/100 mL (50 °C)
Solubility	Anhydrous and trihydrate are soluble in alcohol, glycerol
Solubility in methanol	Anhydrous: 102.75 g/100 g (66.1 °C) Trihydrate: 74.75 g/100 g (15 °C) 214.95 g/100 g (66.1 °C)
Solubility in glycerol	Anhydrous: 20 g/100 g (15 °C) Trihydrate: 143 g/100 g (20 °C)
Magnetic susceptibility (χ)	−89.1·10−6 cm3/mol
Refractive index (nD)	1.567 (trihydrate)
Structure
Crystal structure	Monoclinic (anhydrous, trihydrate) Rhombic (decahydrate)
Thermochemistry
Std enthalpy of formation (ΔfHo298)	−960.9 kJ/mol (anhydrous) −1848.6 kJ/mol (trihydrate)
Hazards
Main hazards	Neurotoxic, probable human carcinogen
GHS pictograms
GHS signal word	Danger
GHS hazard statements	H360, H373, H410
GHS precautionary statements	P201, P273, P308+313, P501
EU classification (DSD)	T N
R-phrases	R33, R48/22, R50/53, R61, R62
S-phrases	S45, S53, S60, S61
NFPA 704	1 3 0
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)	400 mg/kg (mice, oral)
LCLo (lowest published)	300 mg/kg (dog, oral)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Lead(II) acetate (Pb(CH₃COO)₂), also known as lead acetate, lead diacetate, plumbous acetate, sugar of lead, lead sugar, salt of Saturn, or Goulard's powder, is a white crystalline chemical compound with a sweetish taste. It is made by treating lead(II) oxide with acetic acid. Like other lead compounds, it is toxic. Lead acetate is soluble in water and glycerin. With water it forms the trihydrate, Pb(CH₃COO)₂·3H₂O, a colourless or white efflorescent monoclinic crystalline substance.

The substance is used as a reagent to make other lead compounds and as a fixative for some dyes. In low concentrations, it is the principal active ingredient in progressive types of hair colouring dyes. Lead(II) acetate is also used as a mordant in textile printing and dyeing, as a drier in paints and varnishes, and in preparing other lead compounds. It was historically used as a sweetener and for cosmetics.

Lead acetate can be made by boiling elemental lead in acetic acid and hydrogen peroxide. This method of using acetic acid and hydrogen peroxide will also work with lead carbonate or lead oxide.

Pb(s) + H₂O₂ + 2 H⁺(aq) → Pb²⁺(aq) + 2 H₂O(l)
Pb²⁺ + 2 CH₃COO⁻(aq) → Pb(CH₃COO)₂